I am sorry that I do not know the exact detection times of nolva and clomid (I looked into this for several months due to testing issues) but for what its worth, I personally know many people who have used both and were then tested a couple of months later. They all came out clean. I also heard that the detection time for clomid was about two weeks and about the same for nolva. I would give yourself at least four weeks to get it out of your system (I am giving myself six weeks).